261010344 has 64 divisors (see below), whose sum is σ = 763107840. Its totient is φ = 72838080.

The previous prime is 261010339. The next prime is 261010357. The reversal of 261010344 is 443010162.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 261010344.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10842 + ... + 25289.

It is an arithmetic number, because the mean of its divisors is an integer number (11923560).

Almost surely, 2^261010344 is an apocalyptic number.

261010344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261010344 is an abundant number, since it is smaller than the sum of its proper divisors (502097496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261010344 is a wasteful number, since it uses less digits than its factorization.

261010344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36190 (or 36186 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 261010344 is about 16155.8145569946. The cubic root of 261010344 is about 639.0760952773.

The spelling of 261010344 in words is "two hundred sixty-one million, ten thousand, three hundred forty-four".